<?php
namespace org\kahikai\database;

/**
 * 
 * @author ch4mp
 *
 */
interface PictureDao {
	
	/**
	 * 
	 * @param int $speciesId a species id
	 * @return an array of pictures by development step for specified species (never null even if species id is unknown)
	 */
	public function getBySpeciesId($speciesId);
	
	/**
	 * 
	 * @param int $developmentStepId a DevelopmentStep id
	 * @return the Picture of provided DevelopmentStep or null
	 */
	public function getByDevelopmentStepId($developmentStepId);
}
?>